Oil on spark plug

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Aug 20, 2012 | 04:49 PM

00exjay

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Joined: Jun 2012

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Model: Cherokee

Oil on spark plug

Hat does it mean when there is oil on the threads of a spark plug

Aug 20, 2012 | 04:50 PM

UsmclovesXJ

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Joined: Aug 2011

Posts: 4,742

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From: Jacksonville, NC

Year: 1993

Model: Cherokee

Engine: I6 4.0L HO

Oil blow by/ oil consumption

Aug 20, 2012 | 05:34 PM

00exjay

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Joined: Jun 2012

Posts: 369

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Model: Cherokee

I rigged a cold air intake on it 2 years ago and never cleaned or changed the air filter. Could this be the cause?

Aug 20, 2012 | 05:35 PM

JEEPISLIFE88

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Joined: Jul 2012

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From: Canon City,CO

Year: 1988

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by 00exjay

I rigged a cold air intake on it 2 years ago and never cleaned or changed the air filter. Could this be the cause?

Aug 20, 2012 | 05:39 PM

00exjay

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Joined: Jun 2012

Posts: 369

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Model: Cherokee

It's on a cylinder that is misfiring and I think it's missing caus of the oil on the plug. Would this man any sense?

Aug 20, 2012 | 05:59 PM

offroadordnance

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Joined: Jul 2011

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From: Pompano Beach

Year: 1998

Model: Cherokee

Engine: 4.0

Is the valve cover leaking oil, it dripped down, and loosened up the plug? It's probably misfiring because the spark has a poor path to ground, the plug was not able to maintain correct heat range, and losing compression if the plug was allowing some gas to escape. Clean the threads, clean the seat, and install a new plug to proper torque value.